結果
| 問題 | No.1582 Vertexes vs Edges |
| ユーザー |
 takytank
|
| 提出日時 | 2021-07-02 22:13:25 |
| 言語 | C# (.NET 8.0.203) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 29,603 bytes |
| コンパイル時間 | 14,591 ms |
| コンパイル使用メモリ | 169,108 KB |
| 実行使用メモリ | 192,300 KB |
| 最終ジャッジ日時 | 2024-06-29 11:50:32 |
| 合計ジャッジ時間 | 14,948 ms |
|
ジャッジサーバーID （参考情報） |
judge1 / judge3 |
（要ログイン）
テストケース
テストケース表示| 入力 | 結果 | 実行時間 実行使用メモリ |
|---|---|---|
| testcase_00 | AC | 51 ms
28,160 KB |
| testcase_01 | AC | 51 ms
28,032 KB |
| testcase_02 | AC | 51 ms
27,776 KB |
| testcase_03 | WA | - |
| testcase_04 | WA | - |
| testcase_05 | WA | - |
| testcase_06 | WA | - |
| testcase_07 | WA | - |
| testcase_08 | WA | - |
| testcase_09 | WA | - |
| testcase_10 | WA | - |
| testcase_11 | WA | - |
| testcase_12 | WA | - |
| testcase_13 | WA | - |
| testcase_14 | WA | - |
| testcase_15 | WA | - |
| testcase_16 | WA | - |
| testcase_17 | WA | - |
| testcase_18 | WA | - |
| testcase_19 | WA | - |
| testcase_20 | WA | - |
| testcase_21 | WA | - |
| testcase_22 | WA | - |
| testcase_23 | WA | - |
| testcase_24 | WA | - |
| testcase_25 | WA | - |
| testcase_26 | WA | - |
| testcase_27 | WA | - |
| testcase_28 | WA | - |
| testcase_29 | WA | - |
| testcase_30 | WA | - |
| testcase_31 | WA | - |
| testcase_32 | WA | - |
| testcase_33 | WA | - |
| testcase_34 | WA | - |
| testcase_35 | WA | - |
| testcase_36 | AC | 51 ms
27,776 KB |
| testcase_37 | AC | 50 ms
27,644 KB |
| testcase_38 | AC | 50 ms
192,300 KB |
コンパイルメッセージ
復元対象のプロジェクトを決定しています... /home/judge/data/code/main.csproj を復元しました (132 ms)。 MSBuild のバージョン 17.9.6+a4ecab324 (.NET) main -> /home/judge/data/code/bin/Release/net8.0/main.dll main -> /home/judge/data/code/bin/Release/net8.0/publish/
ソースコード
using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Numerics;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Text;
namespace YukiCoder
{
class Program
{
static void Main()
{
using var cin = new Scanner();
int n = cin.Int();
var rer = new Rerooting<(int w, int b)>(
n,
(x, y) => (x.w + y.w, x.b + y.b),
(i, x) => (x.b + 1, x.w),
(0, 0));
for (int i = 0; i < n - 1; i++) {
var (u, v) = cin.Int2(-1);
rer.AddEdge2Way(u, v);
}
rer.Build();
var ret = rer.Search(0);
int ans = int.MaxValue;
for (int i = 0; i < n; i++) {
ans.UpdateMin(Math.Min(ret[i].w, ret[i].b));
}
Console.WriteLine(ans);
}
}
public class Rerooting<T> where T : struct
{
private readonly int n_;
private readonly Func<T, T, T> merge_;
private readonly Func<int, T, T> operateNode_;
private readonly T unit_;
private readonly List<int>[] tempEdges_;
private readonly int[][] edges_;
private readonly T[][] dp_;
private int[] reverseIndexes_;
public Rerooting(
int n,
Func<T, T, T> merge,
Func<int, T, T> operateNode,
T unit)
{
n_ = n;
merge_ = merge;
operateNode_ = operateNode;
unit_ = unit;
tempEdges_ = new List<int>[n];
edges_ = new int[n][];
dp_ = new T[n][];
for (int i = 0; i < tempEdges_.Length; ++i) {
tempEdges_[i] = new List<int>();
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void AddEdge((int a, int b) v) => tempEdges_[v.a].Add(v.b);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void AddEdge(int a, int b) => tempEdges_[a].Add(b);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void AddEdge2Way((int a, int b) v) => AddEdge2Way(v.a, v.b);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void AddEdge2Way(int a, int b)
{
tempEdges_[a].Add(b);
tempEdges_[b].Add(a);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void Build()
{
for (int i = 0; i < tempEdges_.Length; ++i) {
edges_[i] = tempEdges_[i].ToArray();
dp_[i] = new T[tempEdges_[i].Count];
}
}
public T[] Search(int root = 0, bool doseOnlyTreeDp = false)
{
T[] result = new T[n_];
result.AsSpan().Fill(unit_);
TreeDP(root, result);
if (doseOnlyTreeDp == false) {
Reroot(root, result);
}
return result;
}
private void TreeDP(int v, T[] result)
{
var parents = new int[n_];
var indexes = new int[n_];
reverseIndexes_ = new int[n_];
var visited = new bool[n_];
var routeStack = new Stack<int>(n_);
var tempStack = new Stack<int>(n_);
routeStack.Push(v);
tempStack.Push(v);
visited[v] = true;
parents[v] = -1;
while (tempStack.Count > 0) {
int current = tempStack.Pop();
for (int i = 0; i < edges_[current].Length; ++i) {
int next = edges_[current][i];
if (visited[next]) {
reverseIndexes_[current] = i;
continue;
}
visited[next] = true;
parents[next] = current;
indexes[next] = i;
routeStack.Push(next);
tempStack.Push(next);
}
}
while (routeStack.Count > 0) {
int target = routeStack.Pop();
T accum = unit_;
for (int i = 0; i < edges_[target].Length; ++i) {
int child = edges_[target][i];
if (child == parents[target]) {
continue;
}
accum = merge_(accum, dp_[target][i]);
}
result[target] = operateNode_(target, accum);
if (parents[target] >= 0) {
dp_[parents[target]][indexes[target]] = result[target];
}
}
}
private void Reroot(int root, T[] result)
{
int max = 0;
for (int i = 0; i < n_; ++i) {
max = Math.Max(max, edges_[i].Length);
}
var accumL = new T[max + 1];
var accumR = new T[max + 1];
var q = new Queue<BfsInfo>(n_);
q.Enqueue(new BfsInfo(root, -1));
while (q.Count > 0) {
var current = q.Dequeue();
int count = edges_[current.V].Length;
accumL[0] = unit_;
for (int i = 0; i < count; ++i) {
accumL[i + 1] = merge_(accumL[i], dp_[current.V][i]);
}
accumR[count] = unit_;
for (int i = count - 1; i >= 0; i--) {
accumR[i] = merge_(accumR[i + 1], dp_[current.V][i]);
}
result[current.V] = operateNode_(current.V, accumL[count]);
for (int i = 0; i < count; ++i) {
int next = edges_[current.V][i];
if (next == current.P) {
continue;
}
T reverse = operateNode_(current.V, merge_(accumL[i], accumR[i + 1]));
dp_[next][reverseIndexes_[next]] = reverse;
q.Enqueue(new BfsInfo(next, current.V));
}
}
}
private struct BfsInfo
{
public int V { get; set; }
public int P { get; set; }
public BfsInfo(int v, int p)
{
V = v;
P = p;
}
}
}
public struct BitFlag
{
public static BitFlag Begin() => 0;
public static BitFlag End(int bitCount) => 1 << bitCount;
public static BitFlag FromBit(int bitNumber) => 1 << bitNumber;
public static BitFlag Fill(int count) => (1 << count) - 1;
private readonly int flags_;
public int Flag => flags_;
public bool this[int bitNumber] => (flags_ & (1 << bitNumber)) != 0;
public BitFlag(int flags) { flags_ = flags; }
public bool Has(BitFlag target) => (flags_ & target.flags_) == target.flags_;
public bool Has(int target) => (flags_ & target) == target;
public bool HasBit(int bitNumber) => (flags_ & (1 << bitNumber)) != 0;
public BitFlag OrBit(int bitNumber) => (flags_ | (1 << bitNumber));
public BitFlag AndBit(int bitNumber) => (flags_ & (1 << bitNumber));
public BitFlag XorBit(int bitNumber) => (flags_ ^ (1 << bitNumber));
public BitFlag ComplementOf(BitFlag sub) => flags_ ^ sub.flags_;
public int PopCount() => BitOperations.PopCount((uint)flags_);
public static BitFlag operator ++(BitFlag src) => new BitFlag(src.flags_ + 1);
public static BitFlag operator --(BitFlag src) => new BitFlag(src.flags_ - 1);
public static BitFlag operator |(BitFlag lhs, BitFlag rhs)
=> new BitFlag(lhs.flags_ | rhs.flags_);
public static BitFlag operator |(BitFlag lhs, int rhs)
=> new BitFlag(lhs.flags_ | rhs);
public static BitFlag operator |(int lhs, BitFlag rhs)
=> new BitFlag(lhs | rhs.flags_);
public static BitFlag operator &(BitFlag lhs, BitFlag rhs)
=> new BitFlag(lhs.flags_ & rhs.flags_);
public static BitFlag operator &(BitFlag lhs, int rhs)
=> new BitFlag(lhs.flags_ & rhs);
public static BitFlag operator &(int lhs, BitFlag rhs)
=> new BitFlag(lhs & rhs.flags_);
public static bool operator <(BitFlag lhs, BitFlag rhs) => lhs.flags_ < rhs.flags_;
public static bool operator <(BitFlag lhs, int rhs) => lhs.flags_ < rhs;
public static bool operator <(int lhs, BitFlag rhs) => lhs < rhs.flags_;
public static bool operator >(BitFlag lhs, BitFlag rhs) => lhs.flags_ > rhs.flags_;
public static bool operator >(BitFlag lhs, int rhs) => lhs.flags_ > rhs;
public static bool operator >(int lhs, BitFlag rhs) => lhs > rhs.flags_;
public static bool operator <=(BitFlag lhs, BitFlag rhs) => lhs.flags_ <= rhs.flags_;
public static bool operator <=(BitFlag lhs, int rhs) => lhs.flags_ <= rhs;
public static bool operator <=(int lhs, BitFlag rhs) => lhs <= rhs.flags_;
public static bool operator >=(BitFlag lhs, BitFlag rhs) => lhs.flags_ >= rhs.flags_;
public static bool operator >=(BitFlag lhs, int rhs) => lhs.flags_ >= rhs;
public static bool operator >=(int lhs, BitFlag rhs) => lhs >= rhs.flags_;
public static implicit operator BitFlag(int t) => new BitFlag(t);
public static implicit operator int(BitFlag t) => t.flags_;
public override string ToString() => $"{Convert.ToString(flags_, 2).PadLeft(32, '0')} ({flags_})";
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void ForEachSubBits(Action<BitFlag> action)
{
for (BitFlag sub = (flags_ - 1) & flags_; sub > 0; sub = --sub & flags_) {
action(sub);
}
}
public SubBitsEnumerator SubBits => new SubBitsEnumerator(flags_);
public struct SubBitsEnumerator : IEnumerable<BitFlag>
{
private readonly int flags_;
public SubBitsEnumerator(int flags)
{
flags_ = flags;
}
IEnumerator<BitFlag> IEnumerable<BitFlag>.GetEnumerator() => new Enumerator(flags_);
IEnumerator IEnumerable.GetEnumerator() => new Enumerator(flags_);
public Enumerator GetEnumerator() => new Enumerator(flags_);
public struct Enumerator : IEnumerator<BitFlag>
{
private readonly int src_;
public BitFlag Current { get; private set; }
object IEnumerator.Current => Current;
public Enumerator(int flags)
{
src_ = flags;
Current = flags;
}
public void Dispose() { }
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public bool MoveNext() => (Current = --Current & src_) > 0;
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void Reset() => Current = src_;
}
}
}
public class HashMap<TKey, TValue> : Dictionary<TKey, TValue>
{
private readonly Func<TKey, TValue> initialzier_;
public HashMap(Func<TKey, TValue> initialzier)
: base()
{
initialzier_ = initialzier;
}
public HashMap(Func<TKey, TValue> initialzier, int capacity)
: base(capacity)
{
initialzier_ = initialzier;
}
new public TValue this[TKey key]
{
get
{
if (TryGetValue(key, out TValue value)) {
return value;
} else {
var init = initialzier_(key);
base[key] = init;
return init;
}
}
set { base[key] = value; }
}
public HashMap<TKey, TValue> Merge(
HashMap<TKey, TValue> src,
Func<TValue, TValue, TValue> mergeValues)
{
foreach (var key in src.Keys) {
this[key] = mergeValues(this[key], src[key]);
}
return this;
}
}
public class JagList2<T> where T : struct
{
private readonly int n_;
private readonly List<T>[] tempValues_;
private T[][] values_;
public int Count => n_;
public List<T>[] Raw => tempValues_;
public T[][] Values => values_;
public T[] this[int index] => values_[index];
public JagList2(int n)
{
n_ = n;
tempValues_ = new List<T>[n];
for (int i = 0; i < n; ++i) {
tempValues_[i] = new List<T>();
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void Add(int i, T value) => tempValues_[i].Add(value);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void Build()
{
values_ = new T[n_][];
for (int i = 0; i < values_.Length; ++i) {
values_[i] = tempValues_[i].ToArray();
}
}
}
public class DijkstraQ
{
private int count_ = 0;
private long[] distanceHeap_;
private int[] vertexHeap_;
public int Count => count_;
public DijkstraQ()
{
distanceHeap_ = new long[8];
vertexHeap_ = new int[8];
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public void Enqueue(long distance, int v)
{
if (distanceHeap_.Length == count_) {
var newDistanceHeap = new long[distanceHeap_.Length << 1];
var newVertexHeap = new int[vertexHeap_.Length << 1];
Unsafe.CopyBlock(
ref Unsafe.As<long, byte>(ref newDistanceHeap[0]),
ref Unsafe.As<long, byte>(ref distanceHeap_[0]),
(uint)(8 * count_));
Unsafe.CopyBlock(
ref Unsafe.As<int, byte>(ref newVertexHeap[0]),
ref Unsafe.As<int, byte>(ref vertexHeap_[0]),
(uint)(4 * count_));
distanceHeap_ = newDistanceHeap;
vertexHeap_ = newVertexHeap;
}
ref var dRef = ref distanceHeap_[0];
ref var vRef = ref vertexHeap_[0];
Unsafe.Add(ref dRef, count_) = distance;
Unsafe.Add(ref vRef, count_) = v;
++count_;
int c = count_ - 1;
while (c > 0) {
int p = (c - 1) >> 1;
var tempD = Unsafe.Add(ref dRef, p);
if (tempD <= distance) {
break;
} else {
Unsafe.Add(ref dRef, c) = tempD;
Unsafe.Add(ref vRef, c) = Unsafe.Add(ref vRef, p);
c = p;
}
}
Unsafe.Add(ref dRef, c) = distance;
Unsafe.Add(ref vRef, c) = v;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public (long distance, int v) Dequeue()
{
ref var dRef = ref distanceHeap_[0];
ref var vRef = ref vertexHeap_[0];
(long distance, int v) ret = (dRef, vRef);
int n = count_ - 1;
var distance = Unsafe.Add(ref dRef, n);
var vertex = Unsafe.Add(ref vRef, n);
int p = 0;
int c = (p << 1) + 1;
while (c < n) {
if (c != n - 1 && Unsafe.Add(ref dRef, c + 1) < Unsafe.Add(ref dRef, c)) {
++c;
}
var tempD = Unsafe.Add(ref dRef, c);
if (distance > tempD) {
Unsafe.Add(ref dRef, p) = tempD;
Unsafe.Add(ref vRef, p) = Unsafe.Add(ref vRef, c);
p = c;
c = (p << 1) + 1;
} else {
break;
}
}
Unsafe.Add(ref dRef, p) = distance;
Unsafe.Add(ref vRef, p) = vertex;
--count_;
return ret;
}
}
public struct ModInt
{
//public const long P = 1000000007;
public const long P = 998244353;
//public const long P = 2;
public const long ROOT = 3;
// (924844033, 5)
// (998244353, 3)
// (1012924417, 5)
// (167772161, 3)
// (469762049, 3)
// (1224736769, 3)
private long value_;
public static ModInt New(long value, bool mods) => new ModInt(value, mods);
public ModInt(long value) => value_ = value;
public ModInt(long value, bool mods)
{
if (mods) {
value %= P;
if (value < 0) {
value += P;
}
}
value_ = value;
}
public static ModInt operator +(ModInt lhs, ModInt rhs)
{
lhs.value_ = (lhs.value_ + rhs.value_) % P;
return lhs;
}
public static ModInt operator +(long lhs, ModInt rhs)
{
rhs.value_ = (lhs + rhs.value_) % P;
return rhs;
}
public static ModInt operator +(ModInt lhs, long rhs)
{
lhs.value_ = (lhs.value_ + rhs) % P;
return lhs;
}
public static ModInt operator -(ModInt lhs, ModInt rhs)
{
lhs.value_ = (P + lhs.value_ - rhs.value_) % P;
return lhs;
}
public static ModInt operator -(long lhs, ModInt rhs)
{
rhs.value_ = (P + lhs - rhs.value_) % P;
return rhs;
}
public static ModInt operator -(ModInt lhs, long rhs)
{
lhs.value_ = (P + lhs.value_ - rhs) % P;
return lhs;
}
public static ModInt operator *(ModInt lhs, ModInt rhs)
{
lhs.value_ = lhs.value_ * rhs.value_ % P;
return lhs;
}
public static ModInt operator *(long lhs, ModInt rhs)
{
rhs.value_ = lhs * rhs.value_ % P;
return rhs;
}
public static ModInt operator *(ModInt lhs, long rhs)
{
lhs.value_ = lhs.value_ * rhs % P;
return lhs;
}
public static ModInt operator /(ModInt lhs, ModInt rhs)
=> lhs * Inverse(rhs);
public static implicit operator ModInt(long n) => new ModInt(n, true);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static ModInt Inverse(ModInt value) => Pow(value, P - 2);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static ModInt Pow(ModInt value, long k) => Pow(value.value_, k);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static ModInt Pow(long value, long k)
{
long ret = 1;
while (k > 0) {
if ((k & 1) != 0) {
ret = ret * value % P;
}
value = value * value % P;
k >>= 1;
}
return new ModInt(ret);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public long ToLong() => value_;
public override string ToString() => value_.ToString();
}
public static class Helper
{
public static long INF => 1L << 60;
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T Clamp<T>(this T value, T min, T max) where T : struct, IComparable<T>
{
if (value.CompareTo(min) <= 0) {
return min;
}
if (value.CompareTo(max) >= 0) {
return max;
}
return value;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void UpdateMin<T>(this ref T target, T value) where T : struct, IComparable<T>
=> target = target.CompareTo(value) > 0 ? value : target;
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void UpdateMin<T>(this ref T target, T value, Action<T> onUpdated)
where T : struct, IComparable<T>
{
if (target.CompareTo(value) > 0) {
target = value;
onUpdated(value);
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void UpdateMax<T>(this ref T target, T value) where T : struct, IComparable<T>
=> target = target.CompareTo(value) < 0 ? value : target;
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void UpdateMax<T>(this ref T target, T value, Action<T> onUpdated)
where T : struct, IComparable<T>
{
if (target.CompareTo(value) < 0) {
target = value;
onUpdated(value);
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T[] Array1<T>(int n, T initialValue) where T : struct
=> new T[n].Fill(initialValue);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T[] Array1<T>(int n, Func<int, T> initializer)
=> Enumerable.Range(0, n).Select(x => initializer(x)).ToArray();
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T[] Fill<T>(this T[] array, T value)
where T : struct
{
array.AsSpan().Fill(value);
return array;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T[,] Array2<T>(int n, int m, T initialValule) where T : struct
=> new T[n, m].Fill(initialValule);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T[,] Array2<T>(int n, int m, Func<int, int, T> initializer)
{
var array = new T[n, m];
for (int i = 0; i < n; ++i) {
for (int j = 0; j < m; ++j) {
array[i, j] = initializer(i, j);
}
}
return array;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T[,] Fill<T>(this T[,] array, T initialValue)
where T : struct
{
MemoryMarshal.CreateSpan<T>(ref array[0, 0], array.Length).Fill(initialValue);
return array;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static Span<T> AsSpan<T>(this T[,] array, int i)
=> MemoryMarshal.CreateSpan<T>(ref array[i, 0], array.GetLength(1));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T[,,] Array3<T>(int n1, int n2, int n3, T initialValue)
where T : struct
=> new T[n1, n2, n3].Fill(initialValue);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T[,,] Fill<T>(this T[,,] array, T initialValue)
where T : struct
{
MemoryMarshal.CreateSpan<T>(ref array[0, 0, 0], array.Length).Fill(initialValue);
return array;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static Span<T> AsSpan<T>(this T[,,] array, int i, int j)
=> MemoryMarshal.CreateSpan<T>(ref array[i, j, 0], array.GetLength(2));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T[,,,] Array4<T>(int n1, int n2, int n3, int n4, T initialValue)
where T : struct
=> new T[n1, n2, n3, n4].Fill(initialValue);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T[,,,] Fill<T>(this T[,,,] array, T initialValue)
where T : struct
{
MemoryMarshal.CreateSpan<T>(ref array[0, 0, 0, 0], array.Length).Fill(initialValue);
return array;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static Span<T> AsSpan<T>(this T[,,,] array, int i, int j, int k)
=> MemoryMarshal.CreateSpan<T>(ref array[i, j, k, 0], array.GetLength(3));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T[] Merge<T>(ReadOnlySpan<T> first, ReadOnlySpan<T> second) where T : IComparable<T>
{
var ret = new T[first.Length + second.Length];
int p = 0;
int q = 0;
while (p < first.Length || q < second.Length) {
if (p == first.Length) {
ret[p + q] = second[q];
q++;
continue;
}
if (q == second.Length) {
ret[p + q] = first[p];
p++;
continue;
}
if (first[p].CompareTo(second[q]) < 0) {
ret[p + q] = first[p];
p++;
} else {
ret[p + q] = second[q];
q++;
}
}
return ret;
}
private static readonly int[] delta4_ = { 1, 0, -1, 0, 1 };
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void DoIn4(int i, int j, int imax, int jmax, Action<int, int> action)
{
for (int dn = 0; dn < 4; ++dn) {
int d4i = i + delta4_[dn];
int d4j = j + delta4_[dn + 1];
if ((uint)d4i < (uint)imax && (uint)d4j < (uint)jmax) {
action(d4i, d4j);
}
}
}
private static readonly int[] delta8_ = { 1, 0, -1, 0, 1, 1, -1, -1, 1 };
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void DoIn8(int i, int j, int imax, int jmax, Action<int, int> action)
{
for (int dn = 0; dn < 8; ++dn) {
int d8i = i + delta8_[dn];
int d8j = j + delta8_[dn + 1];
if ((uint)d8i < (uint)imax && (uint)d8j < (uint)jmax) {
action(d8i, d8j);
}
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void ForEachSubBits(int bit, Action<int> action)
{
for (int sub = bit; sub >= 0; --sub) {
sub &= bit;
action(sub);
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static string Reverse(string src)
{
var chars = src.ToCharArray();
for (int i = 0, j = chars.Length - 1; i < j; ++i, --j) {
var tmp = chars[i];
chars[i] = chars[j];
chars[j] = tmp;
}
return new string(chars);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void Swap(this string str, int i, int j)
{
var span = str.AsWriteableSpan();
(span[i], span[j]) = (span[j], span[i]);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static char Replace(this string str, int index, char c)
{
var span = str.AsWriteableSpan();
char old = span[index];
span[index] = c;
return old;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static Span<char> AsWriteableSpan(this string str)
{
var span = str.AsSpan();
return MemoryMarshal.CreateSpan(ref MemoryMarshal.GetReference(span), span.Length);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static string Join<T>(this IEnumerable<T> values, string separator = "")
=> string.Join(separator, values);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static string JoinNL<T>(this IEnumerable<T> values)
=> string.Join(Environment.NewLine, values);
}
public static class Extensions
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static Span<T> AsSpan<T>(this List<T> list)
{
return Unsafe.As<FakeList<T>>(list).Array.AsSpan(0, list.Count);
}
private class FakeList<T>
{
public T[] Array = null;
}
}
public class Scanner : IDisposable
{
private const int BUFFER_SIZE = 1024;
private const int ASCII_CHAR_BEGIN = 33;
private const int ASCII_CHAR_END = 126;
private readonly string filePath_;
private readonly Stream stream_;
private readonly byte[] buf_ = new byte[BUFFER_SIZE];
private int length_ = 0;
private int index_ = 0;
private bool isEof_ = false;
public Scanner(string file = "")
{
if (string.IsNullOrWhiteSpace(file)) {
stream_ = Console.OpenStandardInput();
} else {
filePath_ = file;
stream_ = new FileStream(file, FileMode.Open);
}
Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) {
AutoFlush = false
});
}
public void Dispose()
{
Console.Out.Flush();
stream_.Dispose();
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public char Char()
{
byte b;
do {
b = Read();
} while (b < ASCII_CHAR_BEGIN || ASCII_CHAR_END < b);
return (char)b;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public string Next()
{
var sb = new StringBuilder();
for (var b = Char(); b >= ASCII_CHAR_BEGIN && b <= ASCII_CHAR_END; b = (char)Read()) {
sb.Append(b);
}
return sb.ToString();
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public string[] ArrayString(int length)
{
var array = new string[length];
for (int i = 0; i < length; ++i) {
array[i] = Next();
}
return array;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public int Int() => (int)Long();
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public int Int(int offset) => Int() + offset;
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public (int, int) Int2(int offset = 0)
=> (Int(offset), Int(offset));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public (int, int, int) Int3(int offset = 0)
=> (Int(offset), Int(offset), Int(offset));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public (int, int, int, int) Int4(int offset = 0)
=> (Int(offset), Int(offset), Int(offset), Int(offset));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public int[] ArrayInt(int length, int offset = 0)
{
var array = new int[length];
for (int i = 0; i < length; ++i) {
array[i] = Int(offset);
}
return array;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public long Long()
{
long ret = 0;
byte b;
bool ng = false;
do {
b = Read();
} while (b != '-' && (b < '0' || '9' < b));
if (b == '-') {
ng = true;
b = Read();
}
for (; true; b = Read()) {
if (b < '0' || '9' < b) {
return ng ? -ret : ret;
} else {
ret = ret * 10 + b - '0';
}
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public long Long(long offset) => Long() + offset;
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public (long, long) Long2(long offset = 0)
=> (Long(offset), Long(offset));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public (long, long, long) Long3(long offset = 0)
=> (Long(offset), Long(offset), Long(offset));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public (long, long, long, long) Long4(long offset = 0)
=> (Long(offset), Long(offset), Long(offset), Long(offset));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public long[] ArrayLong(int length, long offset = 0)
{
var array = new long[length];
for (int i = 0; i < length; ++i) {
array[i] = Long(offset);
}
return array;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public BigInteger Big() => new BigInteger(Long());
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public BigInteger Big(long offset) => Big() + offset;
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public (BigInteger, BigInteger) Big2(long offset = 0)
=> (Big(offset), Big(offset));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public (BigInteger, BigInteger, BigInteger) Big3(long offset = 0)
=> (Big(offset), Big(offset), Big(offset));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public (BigInteger, BigInteger, BigInteger, BigInteger) Big4(long offset = 0)
=> (Big(offset), Big(offset), Big(offset), Big(offset));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public BigInteger[] ArrayBig(int length, long offset = 0)
{
var array = new BigInteger[length];
for (int i = 0; i < length; ++i) {
array[i] = Big(offset);
}
return array;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public double Double() => double.Parse(Next(), CultureInfo.InvariantCulture);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public double Double(double offset) => Double() + offset;
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public (double, double) Double2(double offset = 0)
=> (Double(offset), Double(offset));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public (double, double, double) Double3(double offset = 0)
=> (Double(offset), Double(offset), Double(offset));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public (double, double, double, double) Double4(double offset = 0)
=> (Double(offset), Double(offset), Double(offset), Double(offset));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public double[] ArrayDouble(int length, double offset = 0)
{
var array = new double[length];
for (int i = 0; i < length; ++i) {
array[i] = Double(offset);
}
return array;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public decimal Decimal() => decimal.Parse(Next(), CultureInfo.InvariantCulture);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public decimal Decimal(decimal offset) => Decimal() + offset;
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public (decimal, decimal) Decimal2(decimal offset = 0)
=> (Decimal(offset), Decimal(offset));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public (decimal, decimal, decimal) Decimal3(decimal offset = 0)
=> (Decimal(offset), Decimal(offset), Decimal(offset));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public (decimal, decimal, decimal, decimal) Decimal4(decimal offset = 0)
=> (Decimal(offset), Decimal(offset), Decimal(offset), Decimal(offset));
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public decimal[] ArrayDecimal(int length, decimal offset = 0)
{
var array = new decimal[length];
for (int i = 0; i < length; ++i) {
array[i] = Decimal(offset);
}
return array;
}
private byte Read()
{
if (isEof_) {
throw new EndOfStreamException();
}
if (index_ >= length_) {
index_ = 0;
if ((length_ = stream_.Read(buf_, 0, BUFFER_SIZE)) <= 0) {
isEof_ = true;
return 0;
}
}
return buf_[index_++];
}
public void Save(string text)
{
if (string.IsNullOrWhiteSpace(filePath_)) {
return;
}
File.WriteAllText(filePath_ + "_output.txt", text);
}
}
}